{
  "manageEntity": {
    "action": "Save",
    "entityId": "677052",
    "entityType": "Track",
    "nonce": "0xe93569198f76e287e1d7a95ba759ca5ab4e3ed4dc5eee0960fbcb9e35ecd1293",
    "signature": "0x3cdea7c5e56b189ed6267548aed04698ab2c5aee20ac4a765dc415daa52247f10abcf7bc836b0f1f86b6e932fe0e20e6350c6b744dd401f1df1ba95eb7af29881c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}